You have a very tough situation with a Mobile Home- they live and breed beneath it, come up to eat-
They are water bugs- and Combat is the best thing I know of, I lived in Texas, home of the Cooka Ruchoo- ha ha
Place a Combat, stick up above every water pipe under the sink, they swet and thats where they get water. Use them in all corners around the kitchen, all corners- use the tube stuff in other places you see them.
Lean no food on the counters or table or floor, nor dirty dishes, they like heat, treat under the Fridge, probably in all your electronics, that have a instant on thing.

If you have roaches that bad then chances are, so do your neighbors. I mention this because you will need to do something on a regular basis to KEEP them away or they will just come back FROM YOUR NEIGHBORS home once “whatever you did” fades away. You mention pest control maybe too expensive, they are not that much considering what you are paying in alergy medicine and other “roach” remedies. Roach bombs are the best “store bought” fix I’ve found, but even they are about 5 to 8 dollars a can. You would need to do each room and outside. You would also need to be away about 2 to 3 hours. Plus repeat this in about 6 months…… Because of your heighbors… Good Luck!

quart jars,Vaseline 2/3 down the jar,piece of bread on bottom……….put you foods,pans,toaster,and whatevers.in the freezer,remove 48 to 72 hours dead roaches,raid max.for roaches.have not seen any for 5 days at my daughters,must keep doing this daily,for 60 days.because of the new hatches,by the way roaches **** cat-nip plants,and it won’t hurt your….good luck.

Sevin dust.